A previous schema extension has defined the attribute value as “FALSE” for object “CN=nisMapEntry,CN=Schema,CN=Configuration,DC=abcd,DC=com,DC=br” differently than the schema extension needed for Windows Server 2012 .

[Status/Consequence]

Adprep cannot extend your existing schema

[User Action]

Contact the vendor of the application that previously extended the schema to resolve the inconsistency. Then run adprep again.